textract/lib/extractors/doc-osx.js

Extracting text from files of various type including html, pdf, doc, docx, xls, xlsx, csv, pptx, png, jpg, gif, rtf, text/*, and various open office.

var spawn = require( 'child_process' ).spawn
  , exec = require( 'child_process' ).exec
  , os = require( 'os' )
  , path = require( 'path' )
  , types
  ;

// textutil -convert txt -stdout foo.doc
function extractText( filePath, options, cb ) {
  var result = ''
    , error = null
    , textutil = spawn( 'textutil', ['-convert', 'txt', '-stdout', filePath] )
    ;

  textutil.stdout.on( 'data', function( buffer ) {
    result += buffer.toString();
  });

  textutil.stderr.on( 'error', function( buffer ) {
    if ( !error ) {
      error = '';
    }
    error += buffer.toString();
  });

  textutil.on( 'close', function( /* code */ ) {
    if ( error ) {
      error = new Error( 'textutil read of file named [[ ' +
        path.basename( filePath ) + ' ]] failed: ' + error );
      cb( error, null );
      return;
    }
    cb( null, result.trim() );
  });
}

function testForBinary( options, cb ) {
  // just osx extractor, so don't bother checking on osx
  if ( os.platform() !== 'darwin' ) {
    cb( true );
    return;
  }

  exec( 'textutil ' + __filename,
    function( error /* , stdout, stderr */ ) {
      var msg;
      if ( error !== null ) {
        msg = 'INFO: \'textutil\' does not appear to be installed, ' +
         'so textract will be unable to extract DOCs.';
      }
      cb( error === null, msg );
    }
  );
}

if ( os.platform() === 'darwin' ) {
  types = ['application/msword', 'application/rtf', 'text/rtf'];
  // types = [];
} else {
  types = [];
}

module.exports = {
  types: types,
  extract: extractText,
  test: testForBinary
};